The head of Pfizer considers an annual revaccination against coronavirus infection necessary take place about every year. He spoke about this, speaking via video link at the Washington Atlantic Council, reports TASS.
“I think that the booster dose, the third dose, provides a very, very high level of protection. The question is how long it will last, “the specialist said, adding that protection against COVID-19 decreases within six months after the second vaccination.
The head of Pfizer noted that it is necessary to monitor the condition of people who have made booster vaccine, after six months, to understand when their level of protection will decrease and they will need a new dose of vaccine. In his opinion, the most likely scenario is an annual revaccination.
Earlier it became known that the Ministry of Health of Ukraine destroyed half a million overdue doses of the AstraZeneca vaccine against coronavirus. Specialists disposed of 500 thousand doses of the drug against COVID-19 at the end of October. The vaccine expired on October 31, the ministry added.